A supersonic vacuum generator device for oil wells including: a cylindrical chamber; a suction device; a central accelerator core inside the cylindrical chamber; a tubular chamber connected to the cylindrical chamber, the tubular chamber including an internal fluid feed space; a concentric accelerator core inside the tubular chamber and connected to the central accelerator core, the concentric accelerator core includes a central vacuum tube having a cylindrical shape with a fluid accumulation chamber; a conical section connected to the fluid accumulation chamber and to a reduced diameter fluid passage that diverges with an angle range between 3.5 to 9 degrees with respect to a center line of the fluid passage; a one-way valve located on each one of the inlets of the central accelerator core; and a one-way valve located on the central vacuum tube.

A method of drawing a fluid into a wellbore from a formation, comprising separating the wellbore into a first section and a second section via an annulus closure device, the annulus closure device having a passage therethrough; and circulating a circulation fluid, via a pump at a surface location, in the first section to reduce a pressure in the second section, wherein reducing the pressure in the second section draws the fluid from the formation into the second section.

A method of drawing a fluid into a wellbore from a formation, comprising separating the wellbore into a first section and a second section via an annulus closure device, the annulus closure device having a passage therethrough; and circulating a circulation fluid, via a pump at a surface location, in the first section to reduce a pressure in the second section, wherein reducing the pressure in the second section draws the fluid from the formation into the second section.

The present invention discloses a pressurized test device and method for in-situ mining natural gas hydrates by jets, relating to the field of exploitation of marine natural gas hydrates. The device comprises an injection system, a jet breakup system, an annular pressure system, an axial pressure system, a backpressure system, a vacuum system, a simulation system, a collecting and processing system and a metering system, all of which can operate independently by controlling pipe valves on pipelines. The loading of the confining pressure of the device is independent of the loading of the axial pressure, without interference to each other. Meanwhile, the jet breakup process of natural gas hydrate-containing sediments can be observed in real time by a video camera.

The present invention discloses a pressurized test device and method for in-situ mining natural gas hydrates by jets, relating to the field of exploitation of marine natural gas hydrates. The device comprises an injection system, a jet breakup system, an annular pressure system, an axial pressure system, a backpressure system, a vacuum system, a simulation system, a collecting and processing system and a metering system, all of which can operate independently by controlling pipe valves on pipelines. The loading of the confining pressure of the device is independent of the loading of the axial pressure, without interference to each other. Meanwhile, the jet breakup process of natural gas hydrate-containing sediments can be observed in real time by a video camera.

There is provided system and methods for restimulating a hydrocarbon producing well using water and pressures below the closure pressure, which results in production rates approaching the initial production rate of the well. There is provided multiple restimulation techniques using water based fluids at or below the closure pressure of the well, which results in production rates approach that of the prior rate upon stimulation.

There is provided system and methods for restimulating a hydrocarbon producing well using water and pressures below the closure pressure, which results in production rates approaching the initial production rate of the well. There is provided multiple restimulation techniques using water based fluids at or below the closure pressure of the well, which results in production rates approach that of the prior rate upon stimulation.

A hydrocarbon reservoir model simulation is executed to distribute gas among available gas injectors associated with a hydrocarbon reservoir. Using the result of the executed hydrocarbon reservoir simulation, streamline tracing is executed to calculate hydrocarbon flow fields. Using the results of the executed hydrocarbon reservoir simulation and the executed streamline tracing, a reservoir pressure equalization (RPE) algorithm is executed to distribute an amount of gas according to an injection strategy to satisfy an assigned voidage replace ratio (VRR) for each region of the hydrocarbon reservoir. Post-processing of the results of the RPE algorithm is performed. Using the result of the post-processing, gas injection in the hydrocarbon reservoir is performed with the available gas injectors.

There is provided a method of producing hydrocarbon material. A first hydrocarbon material is produced from the formation, the first hydrocarbon material including a gaseous hydrocarbon material originally in place in the formation. At least a portion of the produced gaseous hydrocarbon material is injected into the formation to increase the formation pressure. A second hydrocarbon material is produced from the formation.

There is provided a method of producing hydrocarbon material. A first hydrocarbon material is produced from the formation, the first hydrocarbon material including a gaseous hydrocarbon material originally in place in the formation. At least a portion of the produced gaseous hydrocarbon material is injected into the formation to increase the formation pressure. A second hydrocarbon material is produced from the formation.